The striker appeared for Leeds United's Under-23s on Tuesday.
Edmondson's post - which can be found below although it has since been deleted - came around 24 hours after he appeared for Leeds Under-23s as a substitute - and around seven before United's seniors play Swansea City at Elland Road.
However, the 17-year-old is not expected to feature in that game.
What he was doing at Bradford remains to be seen, although a transfer can be ruled out with the January window closed and the one for short-term loans scrapped.
The only way Edmondson could move to the Bantams is if the League One side were without any senior players in his position, which is not currently the case.
One possible explanation is that he was there to see Paudie O'Connor, the Harrogate-born teenager's Leeds teammate currently on loan at Bradford.
And there are, of course, two pairs of legs in Edmondson's post.
Why he choose to delete it in that case, however, is a mystery.
What was the Leeds youngster doing at Bradford?